Our brains have a negativity bias and will remember bad memories more than good ones.
15
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The human sigh acts as a physiological reset button.
23
The average person's skin weighs twice as much as their brain.
131
Your thumb is about the same size as your nose.
124
Only humans shed emotional tears.
331